Best Clan (Mathematically)

Best Clan (Mathematically)

Recently (aka yesterday), I decided to take up the task of figuring out what the average power and damage is for each clan (with the help of Excel ). Right now, I am calculating base power, base damage, damage while ability is in affect (which includes Stop), and ideal life gap (no fury). I have decided to ignore CoD and damage reducing abilities to simplify the process.
However, I have encountered a problem calculating the average power while ability is in affect. I cannot decided on a way to factor in the ability of -X power min Y. I thought about adding the X to the card's base power, but cards like Lothar go against that. Thoughts?